Automatic reversing apparatus for controlling the closure members of periodically operating gas producers



Oct. 6, 1931. c, MIEDBRODT 1,826,363

AUTOMATIC REVERSING APPARATUS .FOR CONTROLLING THE CLOSURE MEMBERS OF PERIODICALLY OPERATING GAS PRODUCERS Filed April 16, 1930 (&2'/ M661 52176224:

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Patented Oct. 6, 1931 UNITED STATES or BERLIN-RQSENTHAL, ennMAnY, ASSIGNQB o Barra e-Merr am. ,AK'IIENGESELLSCHAFT, or BERLIN, GERMANY PATENT; orator.

AUTOMATIC nnvnnsrns ArrARATUs Fen con'rn-ontine ran cncsnzen MEMBER-S or PERIODICALLY OPERATING GAS rn-onuonns Application filed April 16, 1930, Serial No.

In automatic controls for intermittent gas producers, the direction of flow of the pressuremedium (for example water or oil under pressure) supplied to the lifting or actuating cylinders for the closure members of the producer is, in many cases, reversed bymeans of small control cylinders. In many instances, the reversing of the pistons in these control cylinders is also effected by a pressure medium, small throttle members which periodically regulate the supply and escape of the said pressure medium being controlled by means of a rotary cam shaft and suitable levers and rods. This pressure medium may be the same as that for the actuating cylinders.

In such an arrangement it is necessary that cates with the under side of the piston valve 12in the control cylinder 3, and the other with the upper side of said piston. .The

the small throttle members controlled by the cam shaft should not only alternately open and close the passages for the pressure medium to the control cylinders, but also-that, simultaneously with each closing, a way of escape should be open for the amount ofpressure medium present in the cylinder side concerned, said way of escape being closed again at the next reversal.

Whereas special members (cocks or the i like) have hitherto been usedfor providing these means of escape, this purpose is accomplished, in accordance withmy invention, by the insertion of'jet nozzles arranged to provide an interruption point or zone, which does not require to be specially closed, in the pipe between the small throttle members and the control cylinders; By means of said nozzles, the full pressure in the pipe can be transmitted to the control cylinders across the interruption zone when the throttle members are open, while the contents of the cylinders can pass away through said zone, without restriction, when said members are closed.

A typical embodiment of the invention is illustrated on the accompanying drawing.

1 denotes one of the closure members of the gas producer, 2 the corresponding actuating cylinder, 2c the piston, and 2b the piston rod.

By means of pipes 4 and 5, the actuating cylinder is connected with a control cylinder 3, on the one hand, and with a pressure accumulator 6 on the other. A pipe 7 connects the control cylinder 3 with the accumulator movement of the lever '24:.

444,849,- and in Germany March as, 1929.

6, and aipipe 8 connects the control cylinder 3 with a liquid tank 9 which is under atmos The control cylinder 3 houses a movable, balanced piston 12, the piston rod 12a. of

which passes through the cylinder head;

' Disposed laterally ofthe control cylinder 3 are two freely discharging nozzles 14 and 1 112,

t each of which is connected, by a tube 13 or 13a'with a collector 15 and, beyond this latter,

with the accumulator 6, by means of'a pipe 16. Situated a short distance in front of the nozzles l'and 14a are theends of two tubes 17 and 17a, the former of which communipipes 13 and 13a are adapted to be closed .by

with cams 19. and corresponding follower levers 19a and 19]), the two control rods 22a and 22 are raised or lowered, under the action of the spring 21, in accordance with the posi tions of recesses in the adiacently disposed cams 19. Since the throttle member 18 is coupled direct to the rod 22, it is opened or closed in accordance with the position of the control cams. rod 22a is transmitted to the throttle member 18a through an intermediate lever23 with arms of equal length.

In the event of a failure in the supply of pressure medium, the control can also be efl ected by actuating the piston valve 12 by hand. by means of a lever 24, which engages the piston rod 12a. Stops 25 and 26 limit the The method of operation is asfollows The movement of the control The control shaft-20, forjointly actuating A the several closure members in the gas'producer is set in uniform rotation by a driving means not shown in the drawing and thus rotates the two adjacently mounted control earns 19 provided for each system. Each of said cams is provided with a notch. The one cam serves to actuate the throttlemember 18,

In a given position of the cams, either the lever 196 0r 19a is caused to fall into the notch of the corresponding cam by the ten-- sion ofthe spring 21. The movement of the latching lever is transmitted to the throttle member 18 or 18a, as the case may be, through .the control rod 22 or 22a. Thus, when one of the two levers 196 or 19a engages in the notch in its cam, the throttle member 18 or 18a, connected therewith by the rod 22 or 22a, is opened. In the drawing, the lever 19a is shown engaging in the notch of its cam and the throttle member 18a is thereby opened. Under the action of the pressure liquid, which flows from the accumulator through the pipe 16, the collector 1f. the pipe 13a, the nozzle 14a and the tube 17a to the upper chamber of the cylinder the piston 12 is forced downwards. The piston of the actuating cylinder 2, which, prior to thereversal, received pressure on its upper si de, through the pipes 7 and l, and-therefore shut the closure member 1, is now lifted by the pressure of the liquid admitted into the cylinder through the pipe 5, owing to the free outlet from the upper half of the cylinder ali'orded by the pipes i and 8, thereby caus ng the closuremember 1 to open. During the further rotation of the cams 19, the closure member l8a'is again closed, and therefore I "19.7) comes into engagement, and thus eliects the opening of the throttle member 18 when upon the control piston 12 is again moved into the position shown.

During the movement of the piston valve '12'from below upwards, the pressure med um situated above the piston is able to flow away freely through the air gap between the nozzle 14a and the tube 17a. and similar y, during the reverse movement of the-piston, through theair gapbetween 14 and 17. Should the automatic reversal get out of orderxthe control piston 12 can be actuated by hand through the piston rodflla and the handle 24.

I claim 1. Means for controlling the pressure flu d actuated closure members of periodically operating gas producers, comprising, in combination, a control cylinder'with a piston displaceable therein by pressure iiuid sunplied'through ports in the cylinderynozzles spaced from the port inlets, means for supplying the pressure fluid to said nozzles and across the intervening space to said ports, throttle members for controlling the supply to'said nozzles, and mechanism for pcriodically and successively opening and closing: said throttle members, said space providing a means of fluid escape from said control cylinder when said throttle members are closed.

i th

ithrottle members in the 'supplv able cams, and levers co-opcrat." ca msand connected with 2. Means for controlling the pressure fluid actuated closure members of periodically operating gas producers, comprising, in combination, a control cylinder with a piston displaceable therein by pressure fluid supplied through ports in the cylinder, nozzles spaced from the port inlets, pipes for sup flying the pressure fluid to said nozzles and across the intervei'iin space to said ports, throttle members in the supply pipes, and means torperiodically and successivelyopening andclosing saidthrottle members, said space providing afluid escape from said control cylinder when said throttle inembers'are closed.

Means for controlling the pressure fluid actuated closure. members of periodically operating gas producers, comprising, in comation, control cylinder with a piston displaceablc therein by pressure tluid'supplicd i pertain the cylinder, nozzles spaced om the port inlets, nieans'l or sup ilying the re iiuid to said nozzles and across the veniug space to said port-s, thr ttle incinfor cortrollii the supply'to said noz- V and levers co-operatiim said cams a d connected with said throtl. ,ltli tlc mcn'ibers f1; periodically and successively openin and closing' them, said space providing-animus ct fluid escape from said couc g linder when said throttle members are closed.

4. Means for controlling thepressure tiuid actuated closure members of periooically op erating producers, comprising, in combination, arontrol cylinder with a piston displaccable therein by pressure fluid sup pliedthrough ports in the cy inder, nozzles spaced from the port inlets, pi es tor supplying the pressure iiuid'to said nozzles and across :the intervening space-to said ports. pipes, total-- with sai d said throttle members for periodically and successively open-- ing and closing them, said space providing a fluid escape from said control cylinder Whcn said'throttle members are closed.

In testimony whereof I affix my signature.

CA RL HIE BROD'I. 

